161345688609 has 8 divisors (see below), whose sum is σ = 245860096960. Its totient is φ = 92197536336.

The previous prime is 161345688599. The next prime is 161345688613. The reversal of 161345688609 is 906886543161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161345688609 - 2¹⁶ = 161345623073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161345688409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3841563994 + ... + 3841564035.

It is an arithmetic number, because the mean of its divisors is an integer number (30732512120).

Almost surely, 2^161345688609 is an apocalyptic number.

It is an amenable number.

161345688609 is a deficient number, since it is larger than the sum of its proper divisors (84514408351).

161345688609 is an equidigital number, since it uses as much as digits as its factorization.

161345688609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7683128039.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 161345688609 in words is "one hundred sixty-one billion, three hundred forty-five million, six hundred eighty-eight thousand, six hundred nine".